89. 人工智能DS P.104
Each day， more than 6，000 people around the world fall victim to HIV. That's how serious the problem is. The World Health Organization has estimated that about 17 million people have already been infected with this disease. The news is that the virus is now spreading fastest in Asia. It's high time some steps were taken.
Two proven methods should be followed. One way is to teach people how to avoid catching1 the virus sexually through condom promotion2. The other way is to encourage people to sTOP having casual sex. A word to the wise is sufficient， so don't take this warning lightly.
acronym3 只取首字母的缩写词
abbreviation 缩写 HIV 人工智能DS病毒
Thousands of people fall victim to traffic accidents every month in big city. 成为受害者（习惯使用方法）
Several children were infected with food poisoning at the picnic.
spread spread， spread
I had a flu.
follow 遵循
condom 安全套
bookworm 书虫
We should promote more foreigh language study in high school. 倡导
The teacher discouraged her students from cheating.
When （you are） mountain climbing， （you should） wear casual clothing.
